13398815 has 4 divisors (see below), whose sum is σ = 16078584. Its totient is φ = 10719048.

The previous prime is 13398799. The next prime is 13398817. The reversal of 13398815 is 51889331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13398815 - 2⁴ = 13398799 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13398817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1339877 + ... + 1339886.

It is an arithmetic number, because the mean of its divisors is an integer number (4019646).

Almost surely, 2^13398815 is an apocalyptic number.

13398815 is a deficient number, since it is larger than the sum of its proper divisors (2679769).

13398815 is an equidigital number, since it uses as much as digits as its factorization.

13398815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2679768.

The product of its digits is 25920, while the sum is 38.

The square root of 13398815 is about 3660.4391813005. The cubic root of 13398815 is about 237.5137720546.

The spelling of 13398815 in words is "thirteen million, three hundred ninety-eight thousand, eight hundred fifteen".